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Membrane electrode assembly for fuel cell, preparing method for same, and fuel cell system including same

a fuel cell and membrane electrode technology, applied in the manufacture of cell components, final product manufacturing, electrochemical generators, etc., to achieve the effect of improving the performance of the fuel cell

Inactive Publication Date: 2009-04-23
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0012]One embodiment provides a membrane-electrode assembly for a fuel cell that does not catch fire during the manufacturing processes, and that can inhibit distortion of a polymer electrolyte membrane resulting in improvement of a fuel cell performance.

Problems solved by technology

The polymer electrolyte fuel cell has an advantage of high energy density and high power, but it also has problems in the need to carefully handle hydrogen gas and the requirement for accessory facilities such as a fuel reforming processor for reforming methane, methanol, natural gas, and the like in order to produce hydrogen as the fuel gas.

Method used

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  • Membrane electrode assembly for fuel cell, preparing method for same, and fuel cell system including same
  • Membrane electrode assembly for fuel cell, preparing method for same, and fuel cell system including same
  • Membrane electrode assembly for fuel cell, preparing method for same, and fuel cell system including same

Examples

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example 1

[0127]A composition for a microporous layer was prepared by mixing 3.0 g of carbon black in 30 ml of isopropyl alcohol with 1.0 g of 10 wt % polytetrafluoroethylene, and then mechanically agitating them together. Next, a microporous layer was formed by coating the composition for a microporous layer on a carbon paper electrode substrate treated with TEFLON (tetrafluoroethylene) (SGL 31BC; SGL Carbon Group Co., Wiesbaden, Germany) in a screen-printing method and drying it.

[0128]Then, a hydrophilic organic compound layer was formed on the microporous layer of the electrode substrate by impregnating it with glycerine (viscosity: 1.0 N·s / m2). Herein, the hydrophilic organic compound was loaded at 0.5 mg / cm2.

[0129]In addition, a composition for a cathode catalyst layer was prepared by mixing 10 g of 10 wt % NAFION® (DuPont Co.) aqueous dispersion solution with 3.0 g of Pt / C (20 wt %, E-tek Co., Somerset, N.J.) in 30 ml of water, and then mechanically agitating them together. Then, a cath...

example 2

[0134]A single cell was fabricated according to the same method as in Example 1 except for using propylene glycol (viscosity: 0.8 N·s / m2) instead of glycerine as a hydrophilic organic compound.

example 3

[0135]A single cell was fabricated according to the same method as in Example 1 except for using an electrode substrate made of carbon paper.

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Abstract

The membrane-electrode assembly for a fuel cell according to an embodiment includes an anode and a cathode facing each other, and a polymer electrolyte membrane interposed therebetween. At least one of the anode and cathode includes an electrode substrate, a microporous layer disposed on the electrode substrate, and a catalyst layer disposed on the microporous layer. The catalyst layer includes a catalyst and a binder resin, and the binder resin has an average chain length ranging from about 5 to about 30 nm. According to the embodiment, a membrane-electrode assembly can be easily prepared without firing and can be prevented from distorting, improving cell characteristics.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims priority to and the benefit of Korean Patent Application No. 10-2007-0105750 filed in the Korean Intellectual Property Office on Oct. 19, 2007, the entire content of which is incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present embodiments relate to a membrane-electrode assembly for a fuel cell, a method for preparing the same, and a fuel cell system including the same. More particularly, the present embodiments relate to a membrane-electrode assembly that does not catch fire during the manufacturing processes, and that can inhibit distortion of a polymer electrolyte membrane resulting in improvement of fuel cell performance, a method for manufacturing the same, and a fuel cell system including the same.[0004]2. Description of the Related Art[0005]A fuel cell is a power generation system for producing electrical energy through an electrochemical redox reaction ...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M8/10H01M4/90
CPCH01M4/8668H01M4/881Y02E60/50H01M4/926H01M8/0245H01M4/8817Y02P70/50H01M4/86H01M4/88H01M8/04B82Y30/00
Inventor LEE, HAN-KYU
Owner SAMSUNG SDI CO LTD